Okay well I need help with the simple type codes such as::
-Font/text size codes
-font colour codes
-how to center text

stuff like that : S I've tried many many codes but they just dont work, Could you please helpppp???

There are css codes here:
http://www.createblog.com/forums/index.php?showtopic=84325

They have little sections above the code that tells what the code changes. If you want to center text all you need to do is add text-align:center; in your css. If you want font color codes you can google "hex codes" and it will come up with sites that have codes, such as http://www.december.com/html/spec/color.html